The maniacal laughter heard in various places on the album was done by Pink Floyd's road manager, the father of what English actress, nominated for Academy Awards for her work in the films 21 Grams and The Impossible?

Before it was recorded, Pink Floyd performed Dark Side of the Moon for the musical press at what London landmark, also the site of Jimi Hendrix's first guitar-burning and an incident where a jealous audience member pushed Frank Zappa off the stage, breaking his leg?

Since the band Medicine Head had already released an album called Dark Side of the Moon in 1972, the album's title was temporarily changed. Name this working title, also the name of the album's closing track.